Current GMS Dojo

i believe mu gong (final boss) has about 2.5-3b hp; as long as you can deal that amount of damage in less than 3 minutes, you should be fine for the entirety of dojo
however, you must take into account the bosses that may cause delays, e.g. inflicted statuses or dispels; from poison golem, manon, griffey, pap, lyka and mu gong

He's around 3.5b
Cap x 17 x 4 + FA procs to take him down